The nature of the ESB is distributed; ESB is more scalable than the hub-and-spoke architecture. With ESB the ability to deploy separate integration services, scaling up and scaling out becomes easier. An ESB is based on open standards. EAI/hub-and-spoke solutions are generally based on proprietary standards.

An Enterprise Service Bus (ESB) can have either a traditional hub-and-spoke architecture or a distributed, peer-to-peer architecture. Hub-and-Spoke systems are easy to administer but difficult to scale, since as processes are added the hub becomes a communication bottleneck. Most ESB's are based on a peer-to-peer architecture allow hardware resources scattered across the network to be effectively utilized to balance load and scale the number of processes running concurrently.
According to definition in Wikipedia, An ESB generally provides an abstraction layer on top of an implementation of an enterprise...

Lots of nice articles have been published on the net on Hub and Spoke architecture. To start this topic, I am putting together information which I found very useful, some of this information has come from other blogs, company websites (JBOSS, IBM, Cape Clear, BEA, Microsoft etc.). I have practically worked on this architecture and found it's fulfilling all the latest requirements.
Very rapidly we are experiencing advancements in hardware and software technologies, so somehow its overcoming Hub and Spoke architecture downsides. Though I believe this could be considered as a base of modern EAI systems.
When...

Today I was at the Singapore Robotic Games 2009 held at Science Centre, Singapore. As this was my first visit to this event so havn't had any idea about the visitors and overall lookout of the competition. It was scheduled on 20 - 22 January 2009.
I went on last day of robotic games, was really impressed by number of people were participating.

Yesterday,I got this puzzle from my friend, he told me to spend some time on this. Well frankly I don't know the actual name of this puzzle, if you know the name of this game then please let me know!
following is slide show of steps to solve cube puzzle
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About Me

Hello there, if you happen to read this it indicates you want to know about myself. No I am not a writer, director, philosopher or musician, I am an IT professional. Currently I am associated with Credit Suisse, London as an Electronic Trading, Consultant. I have worked in various geographical locations like Singapore, India (Pune, Delhi NCR).
This is my personal blog space; so no choice you will read about my experiences about life, work and family. It’s a mix of all. Note: this is not tech only blog :)